package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.xssf.usermodel.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Slf4j
@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    @Override
    public TurnoverReportVO getTurnoverReport(LocalDate begin, LocalDate end) {
        //1.返回前端需要的日期列表
        //将日期存到集合中
        List<LocalDate> dateList = new ArrayList();
        dateList.add(begin);
        while (!begin.equals(end)) {
             begin = begin.plusDays(1);
            dateList.add(begin);
        }


        //2.返回前端需要的营业额列表
        List<Double> turnoverList = new ArrayList();
        //select sum(amount) from orders where order_time between begin and end and status='5'
        for (LocalDate date : dateList) {
            // 创建当天的开始时间（0点0分0秒）
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            // 创建当天的结束时间（23点59分59分999999999纳秒）
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);

            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }


        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天新增用户数
        List<Integer> newUserList =new ArrayList();
        //存放总用户数
        List<Integer> toTotalUserList =new ArrayList();

        for (LocalDate date : dateList) {
            // 创建当天的开始时间（0点0分0秒）
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            // 创建当天的结束时间（23点59分59分999999999纳秒）
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("end", endTime);

            Integer totalUser = userMapper.countByMap(map);

            map.put("begin",beginTime);
            Integer newUser = userMapper.countByMap(map);

            toTotalUserList.add(totalUser);
            newUserList.add(newUser);
        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .totalUserList(StringUtils.join(toTotalUserList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .build();
    }

    /**
     * 统计指定时间区间内的订单数据
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end之间的每天对应的日期
        List<LocalDate> dateList = new ArrayList<>();

        dateList.add(begin);

        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //存放每天的订单总数
        List<Integer> orderCountList = new ArrayList<>();
        //存放每天的有效订单数
        List<Integer> validOrderCountList = new ArrayList<>();

        //遍历dateList集合，查询每天的有效订单数和订单总数
        for (LocalDate date : dateList) {
            //查询每天的订单总数 select count(id) from orders where order_time > ? and order_time < ?
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);

            //查询每天的有效订单数 select count(id) from orders where order_time > ? and order_time < ? and status = 5
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }

        //计算时间区间内的订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();

        //计算时间区间内的有效订单数量
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();

        Double orderCompletionRate = 0.0;
        if(totalOrderCount != 0){
            //计算订单完成率
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }

        return  OrderReportVO.builder()
                .dateList(org.apache.commons.lang3.StringUtils.join(dateList,","))
                .orderCountList(org.apache.commons.lang3.StringUtils.join(orderCountList,","))
                .validOrderCountList(org.apache.commons.lang3.StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 根据条件统计订单数量
     * @param begin
     * @param end
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status){
        Map map = new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);

        return orderMapper.countByMap(map);
    }

    /**
     * 统计指定时间区间内的销量排名前10
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);
        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = org.apache.commons.lang3.StringUtils.join(names, ",");

        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = org.apache.commons.lang3.StringUtils.join(numbers, ",");

        //封装返回结果数据
        return SalesTop10ReportVO
                .builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

   /**
 * 导出运营数据报表
 * @param response
 */
public void exportBusinessData(HttpServletResponse response) {
    //1. 查询数据库，获取营业数据---查询最近30天的运营数据
    LocalDate dateBegin = LocalDate.now().minusDays(30);
    LocalDate dateEnd = LocalDate.now().minusDays(1);

    //查询概览数据
    BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

    //2. 通过POI将数据写入到Excel文件中
    InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

    try {
        //基于模板文件创建一个新的Excel文件
        XSSFWorkbook excel = new XSSFWorkbook(in);

        //获取表格文件的Sheet页
        XSSFSheet sheet = excel.getSheet("Sheet1");

        // 填充数据--时间
        XSSFRow titleRow = sheet.getRow(1);
        XSSFCell cell = titleRow.getCell(1);

        // 如果单元格不存在，则创建它
        if (cell == null) {
            cell = titleRow.createCell(1);
        }

        // 创建样式并设置居中对齐
        XSSFCellStyle style = excel.createCellStyle();
        style.setAlignment(HorizontalAlignment.CENTER);  // 水平居中
        style.setVerticalAlignment(VerticalAlignment.CENTER);  // 垂直居中

        // 应用样式并设置值
        cell.setCellStyle(style);
        cell.setCellValue("时间：" + dateBegin + "至" + dateEnd);

        //获得第4行
// 获取Excel工作表中的第4行（索引从0开始，所以是第3行）
        XSSFRow dataRow = sheet.getRow(3);
// 将业务数据对象中的营业额设置到该行的第3列（索引从0开始，所以是第2列）
        dataRow.getCell(2).setCellValue(businessDataVO.getTurnover());
// 将业务数据对象中的订单完成率设置到该行的第5列（索引从0开始，所以是第4列）
        dataRow.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
// 将业务数据对象中的新用户数设置到该行的第7列（索引从0开始，所以是第6列）
        dataRow.getCell(6).setCellValue(businessDataVO.getNewUsers());

        //获得第5行
        dataRow = sheet.getRow(4);
        dataRow.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
        dataRow.getCell(4).setCellValue(businessDataVO.getUnitPrice());

        //填充明细数据
        for (int i = 0; i < 30; i++) {
            LocalDate date = dateBegin.plusDays(i);
            //查询某一天的营业数据
            BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

            //获得某一行
            dataRow = sheet.getRow(7 + i);
            dataRow.getCell(1).setCellValue(date.toString());
            dataRow.getCell(2).setCellValue(businessData.getTurnover());
            dataRow.getCell(3).setCellValue(businessData.getValidOrderCount());
            dataRow.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            dataRow.getCell(5).setCellValue(businessData.getUnitPrice());
            dataRow.getCell(6).setCellValue(businessData.getNewUsers());
        }

        //3. 通过输出流将Excel文件下载到客户端浏览器
        ServletOutputStream out = response.getOutputStream();
        excel.write(out);

        //关闭资源
        out.close();
        excel.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

}
